[net-next,v3,4/4] net: lan966x: Add ptp trap rules

Message ID	20221203104348.1749811-5-horatiu.vultur@microchip.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org> From: Horatiu Vultur <horatiu.vultur@microchip.com> To: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org> CC: <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>, <Steen.Hegelund@microchip.com>, <lars.povlsen@microchip.com>, <daniel.machon@microchip.com>, <richardcochran@gmail.com>, <UNGLinuxDriver@microchip.com>, <olteanv@gmail.com>, Horatiu Vultur <horatiu.vultur@microchip.com> Subject: [PATCH net-next v3 4/4] net: lan966x: Add ptp trap rules Date: Sat, 3 Dec 2022 11:43:48 +0100 Message-ID: <20221203104348.1749811-5-horatiu.vultur@microchip.com> In-Reply-To: <20221203104348.1749811-1-horatiu.vultur@microchip.com> References: <20221203104348.1749811-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	net: lan966x: Enable PTP on bridge interfaces \| expand [net-next,v3,0/4] net: lan966x: Enable PTP on bridge interfaces [net-next,v3,1/4] net: microchip: vcap: Add vcap_get_rule [net-next,v3,2/4] net: microchip: vcap: Add vcap_mod_rule [net-next,v3,3/4] net: microchip: vcap: Add vcap_rule_get_key_u32 [net-next,v3,4/4] net: lan966x: Add ptp trap rules

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index f6092983d0281..cadde20505ba0 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -443,11 +443,22 @@ static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { struct lan966x_port *port = netdev_priv(dev); + int err; + + if (cmd == SIOCSHWTSTAMP) { + err = lan966x_ptp_setup_traps(port, ifr); + if (err) + return err; + } if (!phy_has_hwtstamp(dev->phydev) && port->lan966x->ptp) { switch (cmd) { case SIOCSHWTSTAMP: - return lan966x_ptp_hwtstamp_set(port, ifr); + err = lan966x_ptp_hwtstamp_set(port, ifr); + if (err) + lan966x_ptp_del_traps(port); + + return err; case SIOCGHWTSTAMP: return lan966x_ptp_hwtstamp_get(port, ifr); } @@ -456,7 +467,11 @@ static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr, if (!dev->phydev) return -ENODEV; - return phy_mii_ioctl(dev->phydev, ifr, cmd); + err = phy_mii_ioctl(dev->phydev, ifr, cmd); + if (err && cmd == SIOCSHWTSTAMP) + lan966x_ptp_del_traps(port); + + return err; } static const struct net_device_ops lan966x_port_netdev_ops = { diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h index f2e45da7ffd4f..3491f19618358 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h @@ -88,6 +88,10 @@ #define SE_IDX_QUEUE 0 /* 0-79 : Queue scheduler elements */ #define SE_IDX_PORT 80 /* 80-89 : Port schedular elements */ +#define LAN966X_VCAP_CID_IS2_L0 VCAP_CID_INGRESS_STAGE2_L0 /* IS2 lookup 0 */ +#define LAN966X_VCAP_CID_IS2_L1 VCAP_CID_INGRESS_STAGE2_L1 /* IS2 lookup 1 */ +#define LAN966X_VCAP_CID_IS2_MAX (VCAP_CID_INGRESS_STAGE2_L2 - 1) /* IS2 Max */ + /* MAC table entry types. * ENTRYTYPE_NORMAL is subject to aging. * ENTRYTYPE_LOCKED is not subject to aging. @@ -116,6 +120,14 @@ enum lan966x_fdma_action { FDMA_REDIRECT, }; +/* Controls how PORT_MASK is applied */ +enum LAN966X_PORT_MASK_MODE { + LAN966X_PMM_NO_ACTION, + LAN966X_PMM_REPLACE, + LAN966X_PMM_FORWARDING, + LAN966X_PMM_REDIRECT, +}; + struct lan966x_port; struct lan966x_db { @@ -473,6 +485,8 @@ irqreturn_t lan966x_ptp_irq_handler(int irq, void *args); irqreturn_t lan966x_ptp_ext_irq_handler(int irq, void *args); u32 lan966x_ptp_get_period_ps(void); int lan966x_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts); +int lan966x_ptp_setup_traps(struct lan966x_port *port, struct ifreq *ifr); +int lan966x_ptp_del_traps(struct lan966x_port *port); int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev); int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c index e5a2bbe064f8f..300fe40059191 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c @@ -3,6 +3,8 @@ #include <linux/ptp_classify.h> #include "lan966x_main.h" +#include "vcap_api.h" +#include "vcap_api_client.h" #define LAN966X_MAX_PTP_ID 512 @@ -18,6 +20,17 @@ #define TOD_ACC_PIN 0x7 +/* This represents the base rule ID for the PTP rules that are added in the + * VCAP to trap frames to CPU. This number needs to be bigger than the maximum + * number of entries that can exist in the VCAP. + */ +#define LAN966X_VCAP_PTP_RULE_ID 1000000 +#define LAN966X_VCAP_L2_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 0) +#define LAN966X_VCAP_IPV4_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 1) +#define LAN966X_VCAP_IPV4_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 2) +#define LAN966X_VCAP_IPV6_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 3) +#define LAN966X_VCAP_IPV6_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 4) + enum { PTP_PIN_ACTION_IDLE = 0, PTP_PIN_ACTION_LOAD, @@ -35,19 +48,228 @@ static u64 lan966x_ptp_get_nominal_value(void) return 0x304d4873ecade305; } +static int lan966x_ptp_add_trap(struct lan966x_port *port, + int (*add_ptp_key)(struct vcap_rule *vrule, + struct lan966x_port*), + u32 rule_id, + u16 proto) +{ + struct lan966x *lan966x = port->lan966x; + struct vcap_rule *vrule; + int err; + + vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id); + if (vrule) { + u32 value, mask; + + /* Just modify the ingress port mask and exit */ + vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, + &value, &mask); + mask &= ~BIT(port->chip_port); + vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, + value, mask); + + err = vcap_mod_rule(vrule); + goto free_rule; + } + + vrule = vcap_alloc_rule(lan966x->vcap_ctrl, port->dev, + LAN966X_VCAP_CID_IS2_L0, + VCAP_USER_PTP, 0, rule_id); + if (!vrule) + return -ENOMEM; + if (IS_ERR(vrule)) + return PTR_ERR(vrule); + + err = add_ptp_key(vrule, port); + if (err) + goto free_rule; + + err = vcap_set_rule_set_actionset(vrule, VCAP_AFS_BASE_TYPE); + err |= vcap_rule_add_action_bit(vrule, VCAP_AF_CPU_COPY_ENA, VCAP_BIT_1); + err |= vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE, LAN966X_PMM_REPLACE); + err |= vcap_val_rule(vrule, proto); + if (err) + goto free_rule; + + err = vcap_add_rule(vrule); + +free_rule: + /* Free the local copy of the rule */ + vcap_free_rule(vrule); + return err; +} + +static int lan966x_ptp_del_trap(struct lan966x_port *port, + u32 rule_id) +{ + struct lan966x *lan966x = port->lan966x; + struct vcap_rule *vrule; + u32 value, mask; + int err; + + vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id); + if (!vrule) + return -EEXIST; + + vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, &value, &mask); + mask |= BIT(port->chip_port); + + /* No other port requires this trap, so it is safe to remove it */ + if (mask == GENMASK(lan966x->num_phys_ports, 0)) { + err = vcap_del_rule(lan966x->vcap_ctrl, port->dev, rule_id); + goto free_rule; + } + + vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, value, mask); + err = vcap_mod_rule(vrule); + +free_rule: + vcap_free_rule(vrule); + return err; +} + +static int lan966x_ptp_add_l2_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_ETYPE, ETH_P_1588, ~0); +} + +static int lan966x_ptp_add_ip_event_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_EV_PORT, ~0) || + vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0); +} + +static int lan966x_ptp_add_ip_general_key(struct vcap_rule *vrule, + struct lan966x_port *port) +{ + return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_GEN_PORT, ~0) || + vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0); +} + +static int lan966x_ptp_add_l2_rule(struct lan966x_port *port) +{ + return lan966x_ptp_add_trap(port, lan966x_ptp_add_l2_key, + LAN966X_VCAP_L2_PTP_TRAP, ETH_P_ALL); +} + +static int lan966x_ptp_add_ipv4_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key, + LAN966X_VCAP_IPV4_EV_PTP_TRAP, ETH_P_IP); + if (err) + return err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key, + LAN966X_VCAP_IPV4_GEN_PTP_TRAP, ETH_P_IP); + if (err) + lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_add_ipv6_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key, + LAN966X_VCAP_IPV6_EV_PTP_TRAP, ETH_P_IPV6); + if (err) + return err; + + err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key, + LAN966X_VCAP_IPV6_GEN_PTP_TRAP, ETH_P_IPV6); + if (err) + lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_del_l2_rule(struct lan966x_port *port) +{ + return lan966x_ptp_del_trap(port, LAN966X_VCAP_L2_PTP_TRAP); +} + +static int lan966x_ptp_del_ipv4_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP); + err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_GEN_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_del_ipv6_rules(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP); + err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_GEN_PTP_TRAP); + + return err; +} + +static int lan966x_ptp_add_traps(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_add_l2_rule(port); + if (err) + goto err_l2; + + err = lan966x_ptp_add_ipv4_rules(port); + if (err) + goto err_ipv4; + + err = lan966x_ptp_add_ipv6_rules(port); + if (err) + goto err_ipv6; + + return err; + +err_ipv6: + lan966x_ptp_del_ipv4_rules(port); +err_ipv4: + lan966x_ptp_del_l2_rule(port); +err_l2: + return err; +} + +int lan966x_ptp_del_traps(struct lan966x_port *port) +{ + int err; + + err = lan966x_ptp_del_l2_rule(port); + err |= lan966x_ptp_del_ipv4_rules(port); + err |= lan966x_ptp_del_ipv6_rules(port); + + return err; +} + +int lan966x_ptp_setup_traps(struct lan966x_port *port, struct ifreq *ifr) +{ + struct hwtstamp_config cfg; + + if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) + return -EFAULT; + + if (cfg.rx_filter == HWTSTAMP_FILTER_NONE) + return lan966x_ptp_del_traps(port); + else + return lan966x_ptp_add_traps(port); +} + int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr) { struct lan966x *lan966x = port->lan966x; struct hwtstamp_config cfg; struct lan966x_phc *phc; - /* For now don't allow to run ptp on ports that are part of a bridge, - * because in case of transparent clock the HW will still forward the - * frames, so there would be duplicate frames - */ - if (lan966x->bridge_mask & BIT(port->chip_port)) - return -EINVAL; - if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) return -EFAULT; diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c index 04a2afd683cca..ba3fa917d6b78 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c @@ -4,14 +4,6 @@ #include "vcap_api.h" #include "vcap_api_client.h" -/* Controls how PORT_MASK is applied */ -enum LAN966X_PORT_MASK_MODE { - LAN966X_PMM_NO_ACTION, - LAN966X_PMM_REPLACE, - LAN966X_PMM_FORWARDING, - LAN966X_PMM_REDIRECT, -}; - struct lan966x_tc_flower_parse_usage { struct flow_cls_offload *f; struct flow_rule *frule; diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c index 44f40d9149470..d8dc9fbb81e1a 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c @@ -5,10 +5,6 @@ #include "vcap_api.h" #include "vcap_api_client.h" -#define LAN966X_VCAP_CID_IS2_L0 VCAP_CID_INGRESS_STAGE2_L0 /* IS2 lookup 0 */ -#define LAN966X_VCAP_CID_IS2_L1 VCAP_CID_INGRESS_STAGE2_L1 /* IS2 lookup 1 */ -#define LAN966X_VCAP_CID_IS2_MAX (VCAP_CID_INGRESS_STAGE2_L2 - 1) /* IS2 Max */ - #define STREAMSIZE (64 * 4) #define LAN966X_IS2_LOOKUPS 2 @@ -219,9 +215,12 @@ static void lan966x_vcap_add_default_fields(struct net_device *dev, struct vcap_rule *rule) { struct lan966x_port *port = netdev_priv(dev); + u32 value, mask; - vcap_rule_add_key_u32(rule, VCAP_KF_IF_IGR_PORT_MASK, 0, - ~BIT(port->chip_port)); + if (vcap_rule_get_key_u32(rule, VCAP_KF_IF_IGR_PORT_MASK, + &value, &mask)) + vcap_rule_add_key_u32(rule, VCAP_KF_IF_IGR_PORT_MASK, 0, + ~BIT(port->chip_port)); if (lan966x_vcap_is_first_chain(rule)) vcap_rule_add_key_bit(rule, VCAP_KF_LOOKUP_FIRST_IS,

[net-next,v3,4/4] net: lan966x: Add ptp trap rules

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